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GFS2: Move glock superblock pointer to field gl_name

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What uniquely identifies a glock in the glock hash table is not
gl_name, but gl_name and its superblock pointer. This patch makes
the gl_name field correspond to a unique glock identifier. That will
allow us to simplify hashing with a future patch, since the hash
algorithm can then take the gl_name and hash its components in one
operation.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson
2015-03-16 11:52:05 -05:00
parent 81648d0431
commit 15562c439d
11 changed files with 75 additions and 74 deletions
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6
fs/gfs2/lops.c
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@@ -70,7 +70,7 @@ static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
static void maybe_release_space(struct gfs2_bufdata *bd)
{
struct gfs2_glock *gl = bd->bd_gl;
struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
struct gfs2_rgrpd *rgd = gl->gl_object;
unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
struct gfs2_bitmap *bi = rgd->rd_bits + index;
@@ -585,7 +585,7 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
static void gfs2_meta_sync(struct gfs2_glock *gl)
{
struct address_space *mapping = gfs2_glock2aspace(gl);
struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
int error;
if (mapping == NULL)
@@ -595,7 +595,7 @@ static void gfs2_meta_sync(struct gfs2_glock *gl)
error = filemap_fdatawait(mapping);
if (error)
gfs2_io_error(gl->gl_sbd);
gfs2_io_error(gl->gl_name.ln_sbd);
}
static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)